<template>
    <transition name="slide">
      <div class="user-center">
        <div class="back" @click="back">
          <i class="icon-back"></i>
        </div>
        <div class="switches-wrapper">
          <switches @switch="switchItem" :currentIndex="currentIndex" :switches="switches"></switches>
        </div>
        <div class="play-btn" ref="playBtn" @click="random">
          <i class="icon-play"></i>
          <span class="text">随机播放全部</span>
        </div>
        <div class="list-wrapper" ref="listWrapper">
          <scroll ref="favoriteList" class="list-scroll" v-if="currentIndex===0" :data="favoriteList">
            <div class="list-inner">
              <song-list :songs="favoriteList" @select="selectSong"></song-list>
            </div>
          </scroll>
          <scroll ref="playList" class="list-scroll" v-if="currentIndex===1" :data="playHistory">
            <div class="list-inner">
              <song-list :songs="playHistory" @select="selectSong"></song-list>
            </div>
          </scroll>
        </div>
        <div class="no-result-wrapper" v-show="noResult">
          <no-result :title="noResultDesc"></no-result>
        </div>
      </div>
    </transition>
</template>

<script>
  import Switches from 'base/switches/switches';
  import {mapGetters,mapActions} from 'vuex';
  import Scroll from 'base/scroll/scroll';
  import SongList from 'base/song-list/song-list';
  import Song from 'common/js/song';
  import {playlistMixin} from "common/js/mixin";
  import NoResult from 'base/no-result/no-result';

  export default {
        mixins: [playlistMixin],
        data () {
          return {
            currentIndex: 0,
            switches: [
              {name: '我喜欢的'},
              {name: '最近听的'}
            ]
          }
        },
      computed: {
        ...mapGetters([
          'favoriteList',
          'playHistory'
        ]),
        noResult () {
          if (this.currentIndex === 0) {
            return !this.favoriteList.length
          }else {
            return !this.playHistory.length
          }
        },
        noResultDesc () {
          if (this.currentIndex === 0) {
            return '暂无收藏歌曲';
          }else {
            return '你还没有听过歌曲';
          }
        }
      },
      methods: {
        ...mapActions([
          'insertSong',
          'randomPlay'
        ]),
        handlePlaylist(playlist) {
          const bottom = playlist.length > 0 ? '60px' : '';
          this.$refs.listWrapper.style.bottom = bottom;
          this.$refs.favoriteList && this.$refs.favoriteList.refresh();
          this.$refs.playList && this.$refs.playList.refresh();
        },
         back () {
          this.$router.back()
        },
        switchItem (index) {
          this.currentIndex = index;
        },
        selectSong (song) {
          this.insertSong(new Song(song))
        },
        // 随机播放
        random () {
          let list = this.currentIndex === 0 ?this.favoriteList :this.playHistory;
          if (list.length === 0) {
            return
          };
          list = list.map((song) => {
            return new Song(song)
          });
          this.randomPlay({
            list
          })
        }
      },
        components: {
          Switches,
          Scroll,
          SongList,
          NoResult
        }
    }
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
  @import "~common/stylus/variable"

  .user-center
    position: fixed
    top: 0
    bottom: 0
    z-index: 100
    width: 100%
    background: $color-background
    &.slide-enter-active, &.slide-leave-active
      transition: all 0.3s
    &.slide-enter, &.slide-leave-to
      transform: translate3d(100%, 0, 0)
    .back
      position absolute
      top: 0
      left: 6px
      z-index: 50
      .icon-back
        display: block
        padding: 10px
        font-size: $font-size-large-x
        color: $color-theme
    .switches-wrapper
      margin: 10px 0 30px 0
    .play-btn
      box-sizing: border-box
      width: 135px
      padding: 7px 0
      margin: 0 auto
      text-align: center
      border: 1px solid  $color-text-l
      color: $color-text-l
      border-radius: 100px
      font-size: 0
      .icon-play
        display: inline-block
        vertical-align: middle
        margin-right: 6px
        font-size: $font-size-medium-x
      .text
        display: inline-block
        vertical-align: middle
        font-size: $font-size-small
    .list-wrapper
      position: absolute
      top: 110px
      bottom: 0
      width: 100%
      .list-scroll
        height: 100%
        overflow: hidden
        .list-inner
          padding: 20px 30px
    .no-result-wrapper
      position: absolute
      width: 100%
      top: 50%
      transform: translateY(-50%)
</style>
